Korean J Parasitol.  2013 Feb;51(1):125-128. 10.3347/kjp.2013.51.1.125.

First Feline Case of Otodectosis in the Republic of Korea and Successful Treatment with Imidacloprid/Moxidectin Topical Solution

  • 1Department of Parasitology, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea. sungshik@jnu.ac.kr
  • 2Biotherapy Human Resources Center, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea.


In April 2010, pruritic symptoms were recognized in 3 privately-owned Siamese cats raised in Gwangju, Korea. Examination of ear canals revealed dark brown, ceruminous otic exudates that contain numerous live mites at various developmental stages. Based on morphological characteristics of adult mites in which caruncles were present on legs 1 and 2 in adult females and on legs 1, 2, 3, and 4 in adult males while the tarsus of leg 3 in both sexes was equipped with 2 long setae, the mite was identified as Otodectes cynotis. Ten ear mite-free domestic shorthaired cats were experimentally infected with O. cynotis to evaluate the efficacy of 10% imidacloprid/1% moxidectin spot-on. Live mites were recovered from 1 of 10 treated cats on day 9 post-treatment (PT) while no live mites were observed from the ear canals of treated cats on days 16 and 30 PT. The efficacy of 10% imidacloprid/1% moxidectin spot-on on O. cynotis in cats was, therefore, 90% on day 9 and 100% on days 16 and 30 PT. This is the first report of otodectosis in 3 cats naturally infested with O. cynotis in Gwang-ju, Korea. Both natural and experimental infestations were successfully treated with 10% imidacloprid/1% moxidectin spot-on.


Otodectes cynotis; cat; imidacloprid; moxidectin; Korea

MeSH Terms

Acaricides/*administration & dosage
Administration, Topical
Cat Diseases/*diagnosis/*drug therapy
Ear Diseases/diagnosis/drug therapy/veterinary
Imidazoles/*administration & dosage
Macrolides/*administration & dosage
Mite Infestations/diagnosis/drug therapy/*veterinary
Nitro Compounds/*administration & dosage
Psoroptidae/*growth & development
Republic of Korea
Solutions/administration & dosage
Treatment Outcome
Nitro Compounds
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